Home / 20,165.90-30,230.22-10,812.43

Finding the Fourth Proportional to 20,165.90, 30,230.22 and 10,812.43

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Solution

The fourth proportional to 20,165.90, 30,230.22 and 10,812.43 is: 16,208.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,165.90 : 30,230.22 = 10,812.43 : x
  2. Step 2: Convert to fraction form
    20,165.90/30,230.22 = 10,812.43/x
  3. Step 3: Cross multiply
    20,165.90x = 30,230.22 × 10,812.43
  4. Step 4: Simplify right side
    20,165.90x = 326,861,986.48
  5. Step 5: Solve for x
    x = 326,861,986.48/20,165.90
  6. Step 6: Final answer
    x = 16,208.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.